Determination of sorbed metals, amorphic Fe, oxidic Mn, and reactive particulate organic carbon in sediments and soils
A current approach to evaluating the potential toxicity of metal pollutants (MP) in sediments requires using methods for estimating sorbed metals, amorphic Fe oxide, Mn oxides, and reactive particulate organic carbon (RPOC). Methods for estimating these variables are reevaluated and extraction conditions optimized. The hydroxylamine hydrochloride method, used to estimate the quantities of sorbed metals and amorphic Fe oxide and oxidic Mn adsorbents, was found to yield excellent recovery of MP spikes added at the beginning of the extraction, and adequate precision and selectivity for amorphic over crystalline Fe oxides. Hot KOH was tentatively selected over NH/sub 4/OH for estimating RPOC because of its greater convenience; correlations with laboratory sorption experiments will be required to provide an adequate basis for selection. Determination of both sorbed metals and RPOC are relatively insensitive to solid-to-extractant ratio. Metal pollutants and RPOC extraction are also relatively insensitive to normality of HCl and KOH, respectively. 10 refs., 2 figs.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6704684
- Report Number(s):
- PNL-SA-16048; CONF-8809171-1; ON: DE89001744
- Resource Relation:
- Conference: 3. international conference on environmental contamination, Venice, Italy, 28 Sep 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON COMPOUNDS
TOXICITY
IRON COMPOUNDS
MANGANESE COMPOUNDS
METALS
SORPTIVE PROPERTIES
AQUATIC ECOSYSTEMS
AQUATIC ORGANISMS
SEDIMENTS
SOILS
ECOSYSTEMS
ELEMENTS
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
510200* - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)